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#11
Here's one I found (haven't used it personally): StorageCrypt, encrypt and password protect external hard drive, usb drive, flash drive.. It's not free though, cost about $30US.
I question why you need a 2TB drive to do your backups? You listed about 44GB of data that you backup, how could that ever fill a 2TB drive unless you copy the same data over and over again? That seems pointless. You should use a backup program that can make differential backups which, after the first full backup, only copies the changed files. Most backup programs also let you password protect the backup.